package com.cht.commonUtil.infra;

import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.cht.commonUtil.structure.S2;
import com.cht.commonUtil.webInit.SP;
import com.cht.commonUtil.widgets.Widgets;
import com.google.gson.Gson;

public class QuerySys2Subsys extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doPost(request,response);
	}

	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		request.setCharacterEncoding( SP.UIcodeSet );
		response.setContentType("application/json");
		response.setCharacterEncoding( SP.UIcodeSet );
		
		Connection conn = null;
		PreparedStatement ps = null;
		ResultSet rs = null;
		
		int sysSN = Integer.parseInt( request.getParameter("sysSN") );
		List<S2> subsysList = new ArrayList<S2>();
		try {
			String sql = "SELECT t2.subsysId,t2.subsysDesc FROM mpsys2subsys t1, subsyses t2 WHERE t1.subsysId=t2.subsysId AND t1.sysSN=?";
			conn = Widgets.getConn();	
			ps = conn.prepareStatement(sql);
			ps.setInt(1, sysSN);
			rs = ps.executeQuery();
			while (rs.next()) {
				S2 subsys = new S2();
				subsys.setS1( rs.getString("subsysId") );
				subsys.setS2( rs.getString("subsysDesc") );
				subsysList.add(subsys);
			}
		} catch ( Exception e) {
			Widgets.errLog(e);
		} finally {
			try {
				if (rs != null) {rs.close();}
				if (ps!= null) {ps.close();}
				if (conn!= null) {conn.close();}
			} catch (SQLException e) { e.printStackTrace(); }
		}
		response.getWriter().write(new Gson().toJson(subsysList));	
	}

}
